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I've been using ReScript for a few months now. So far I mostly like it, but it takes some time to get used to it. The error messages can be confusing though so I try not to depend too much on type inference. The other downside is that some bindings for some of the web apis seem to be missing (like for the types in the Dom module).
Btw, for Material UI there are already bindings [1]
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As a sort of litmus test I use the number of stars a superset of(or language compiling to) JavaScript has on GitHub and how that compares to fartscroll.js: https://github.com/theonion/fartscroll.js/
By this measure ReScript is still a niche language.
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I have to admit I don't know much about ReScript and only have very basic exposure to OCAML, here is how you do await in it:
https://github.com/ocsigen/lwt
The `let* in` is a generic syntax for monads, it doesn't need a special one just for promise. This was in fact a debate back when async/await was in consideration for ECMAScript, but special syntax is hip so now we have `async/await` for Promise, `.?` for optionals and `flatMap` for arrays, basically the same thing.
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from-typescript-to-rescript
Frontend of https://Inhyped.com written in TypeScript and rewritten in ReScript
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genType
Auto generation of idiomatic bindings between Reason and JavaScript: either vanilla or typed with TypeScript/FlowType.
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InfluxDB
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You can accomplish it with a library like zod[1]. It's not the prettiest though; first class support would definitely be better.
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Idris 2 looks promising... I suggest keep an eye on it https://github.com/idris-lang/Idris2
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There is a fork of ReScript that supports ReasonML syntax and with the goal of maintaining Ocaml compatibility: https://github.com/melange-re/melange.
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There is also F# via Fable: https://fable.io
Business logic can be shared with .NET and it has lots of ways to interoperate with JS. There's even a TypeScript converter though of course it's not as pleasant as "yarn add" and YMMV : https://fable.io/ts2fable/
Here's a demo of building some React components in F#: https://www.youtube.com/watch?v=a6Ct3CM_lj4&t=860s